Improvement in drop-light gasaliers



c. n'EAvs. l, Drop-Light Gasaliers.

Patented May 5,1874.

No.l5.0,466.

" jc. DEVS 4Drop-Light Gasliers.

Patented May 5,1874.

UNITE- PATENfr CHARLES EEAYSOR NEW YORK, N. Y., ASSIeNoR To ARcnERa.PAN'eoAST l MANUFACTURING COMPANY, oF SAME" PLAGE.

K r IMPROVEMENT IN DROP-LIGHT GASALIER-S".

Specification forming paxt of Letters Patent No. 150.4166, dated May 5,1874; application filed V January 13, 1874.

` and I do hereby declare that the following is a full, clear, and exactdescription of the same, reference being hadto the accompanying drawing,making part of this specification.

This invention consists in the combination of the following parts toproduce an improved drop-light gasalier, to wit: A main stem connectedto a main distributer, the latter-'provided with stationary branch-light ducts; a drop-light tube arranged to slide up and down within thesaid main stem, and receiving gas from the ceiling -joint through astationary supply-pipe, in such manner as to constitute a gas-Way forthe drop-light independent and separate from that for supplying the Saidmain distributer, a toothed rack arranged longitudinally upon the saiddrop-light tube; a cogwheel arranged to engage the teeth of the saidrack 5 asprin g-druin containing a spring, which is wound up bythe actof drawing down the said drop-light tube, and an inclosingcase forcovering the said spring drum and cogwheel, all arrangedand having amode of op` eration as will be hereinafter more fully set forth.

In the accompanying drawing, Figure lis alongitudinal vertical Sectionof a center-slide drop-light gasalier, taken on the line x x, Fig. 2,and showing my improvements applied thereto. Fig. 2 is a crosssection ofthe same, taken on the plane of the line y y, Fig. l. Fig. 3 is a frontelevation of the same, showin g a modification in the arrangement ot theparts;

'and Fig. 4. is a side view oi the arrangement of parts shown in Fig. 3.

A designates the main stem ofthe gasalier. This stem is shown asprovided with an annular gas-duct, a, for supplying gas to thestationary lights through the branch ducts B.

The said branch-light ducts are shown as connected to, and opening into,a distributer, G, y

which receives gas through the annular gasway a. D is-the drop-lightgas-duct, and it is a tube arranged to vslide up and down within themain stem A, receiving gas through apipe,

D', and any suitable packing may be employed, as shown at m, forinstance, in Fig. l. This drop-light tube D is shown as provided, at itslower end, with a small distributer, b, to which is connected thedrop-light. In this particular instance the arms c c of a harp 7droplight are shown. E is a spring-barrel, mounted ou an axis or arbor,which is attached or connected, in any desirable or convenient manner,

directly or indirectly, to the main stem A. F is an inclosing-caseattached to the main Stem A. G designates a rack or series of cogs orteeth, attached to, or cast or formed with or upon, the drop-light tube,and extending along the said tube the required distance, corresponding'to the distance the said tube is designed to be drawn down. H is acog-wheel mounted on a shaft, I, and arranged to revolve in Suitablebearings ff, attached to the main stem A,

or to a collar thereon, or to a casting or eXf tension-tube, o,connected thereto. This cogwheel H is so arranged on the sha-ft I thatits teeth will engage with the teeth of the rack Gr, and, in the exampleshown, this rack is eX- posed through a slot or opening, g, in the`lower end, of the main stem A, for a sufficient distance to permit ofsuch engagement. The

The spring-drum, in all the figures, is shown as arranged on one side ofthe mam Stem. This is done to bring the mechanism within as small acompass as possible; but it is obvious thatv the spring-drum shown inFigs. 3 and 4 could be mounted on a shaft directly over the opening y,and so that its teeth should engage with the rack G.

In all the gures I have shown the shaft I as projeetingacross the stemAto the side opposite to that occupied by t-he Springdrum, in order toshow how readily two spring-drums may be employed with heavy drop lightsfor In Figs. l and 2 this spring-drum operating the shaft carrying thecog-Wheel H, which engages with the rack G.

The'tube D may be provided with any suitable guides for causing itsteeth to certainly engage with the cog-Wheel, say by screws h h.

I am aware that the above-described parts of a gasalier are not new,when separately considered 5 and. I do not, therefore, claim thecombination of a spring-drum, rack, and cog-Wheel as a sustainingmechanism for an extensionchandelier; nor do I claim a main-stem for acenter drop-light gasalier containing two independent gas-Ways 5 butWhat I claim as my invention, and desire to secure by Letters Patent,is-

The combination, in a gasalier, of the following elements: The main stemA, drop light tube D, supply-pipe D', rack Gr, spring-drum E, cog-WheelH, main distributer C, inclosin gcase F, and the stationary branch-lightducts B B, the said parts being arranged and havinga mode ofoperationsubstantially as herein specified.

Witnesses: CHARLES DEAVS.

M. M. LIVINGSTON, A. J. DE LACY.

